Surface-grinder.



H. F. A. KLEI NSCHMIDT.

' SURFACEGRINDER.

APPLICATION FILED OCT. 30. |9l6- 1,225,040. Patented May 8,1917.

8 ISHEETS-SNEET H. F. A. KLEINSCHMIDT.

' SURFACE GRINDER. APPucmoN FILED ocnso, 191 1,225,040. Patented May8,1917

I SHEETS-SHEET 2.

H. F. AIKLEENSCHMID].

' su'nmcssmuom.

APPHCATION HLED OCT.

' Patented May 8, 1917.

H. F. A. KLELNSCHMIDT. SURFACE GRINDER. APPLICATION-FILED OCT. 30' I I6.

Patented May 8, 1917 r Jzzuezziar wmfleifi, 24/

H F. A. KLE INSC-HMIDT. SURFACE GRINDER. APPLICATION FILED OCT- 30. 1916.

1,225,040; Patented May 8,1917.

1 SHEETS-SHEET 6- H. r. A. KLEINSCHMIDT.

SURFACE GRINDER.

APFLIQATION FILED OCT. 30. 1916- I 1,225,040. Patented M21 8, 19w.

m 77 97 I 9 I I V 1 I j V s1 1 X349 77 I. as w I 21 Q I? I I; I Y I l 79 UNITED STATES" PATENT oFF1oF.

. HENRY F. a. xnnmsonmnr, or .ronnsrown, rnnnsrnvamn.

SP'BFACE-GRINDEI BIJ Specification of Letters Patent.

Patented May 8. 1917.

Application filed October 30, 1916. Serial No. [28,546.

I track work.

' same may be -out .of true due to wear or Such machines are used for the urpose of restoring to a true running sur ace the head, or top surface, of rails, where such rails have been worn was to produce a low spot, or ineonnection with the welding of rail joints 511363888 where the head of the 20 rail has become distorted by reason of such welding; also for restoring the running surface 'at' any point in the trackwhere the other causes. V

In nearly all surface grinding machines heretofore developed forythis purpose that "portion of the machine whichcarries the grindin -'wheel is made to run or slide on th'hea of the rail itself, thereb reproducing."to a certain extent the irregularities existing in the rail; also in some of these machines the forward and-back motion of the grinding wheel is accomplished by hand power. My invention does away with all these objections, as the grindin wheel is carried, on rigid slides indepen ent of the rail-or surface to be ground, and a true surface can be obtained without regard to the condition in which the rail or surface to bevgrdund may be. I also provide for an automatic power driven mechanism for moving the grinding wheel back and forth over the wibrk,

Th machine consists essentiall of a carriagel' supporting a motor an grinding whee shaft, the motor being belted to the inding wheel shaft direct by means of a Feather or chain belt, the latter being preferable. This carriage is supported on a rigid rectangular frame on which the carriage m es to and fro, the rectangular frame bein supported at each end on rollers which come inconta'ct. e-ith the head of the rail.

These rol'le'rs remain practically stationary when the macline is in operation, and their purpose is simply to establish a fixed distance between the carriage and the surface of the rail at any point in the travel of the carriage. Means are also provided for tipping the frame to one side or the other, so that the grin ling wheel can be made to grind to the exact contour of the rail head. By means of 1. round post attached to the end of a car or other support and a sliding attachment to said post, theframe of the machine can beheld upright in any position desired.

The inventi in will be more readily understood by r1 :ference to the accompanying drawings, whe rein Figure 1 is a side elevation of the entire machine;

Fig. 2 is an elevation of the left-hand'end of the machini 1 shown in Fig. 1;

Fig. 3 is a I lan View of the machine; Fig. 4 is a s1 :ctional view on the lines 4-4 ofFigs.1and5;-

Fig. 5 is a s ectional view on the line 55 of Fig. 1;

a Fig. 6 is a section on the line 6-6 of Fig. .1; a Fi 7 is a s ectional view on the line 7 -7 .of Fig. 6;

Fig. 8 is a s ectional View on the line 8-8 of Fig. 7;

Fig. 9 is a sectional view on the line 99 of Fig. 1; p v

Fig. 10 is at elevation of a catch employed for;i holding the reversing lever in posit on, an

Fig. 11 is a face view of one of the bevel gears of the re ciprocating mechanism, a portion of which is best shown in'Fig. 4.

' Referring t r the drawings, and more particularly to Figs." 1 and 3, it will be seen that the grin ling device is primarily supported upon wheels or rollers 20 and secondarily supp orted by the end of a car, a portion of 'wiiich is indicated at 21-. The wheels 20 311 intended to rest upon the track rails and serve to support the frame 22 of the machine. The wheels 20 are rotatably moui ted on axles or shafts '23, which, as is clearly'shownin Fig. 9, have eccentric end portlons 25 mounted in the bearings '25, (see Figs.' 1 and 9), this expedient being adopted in order to adjust the height of the frame and the parts supported thereby with relation to the rail. The eccentrically ]ll111te l.:l1flft5 or axles 3 are rotated-to accomplish this result by means of levers 2T. the lower ends'of which described hereinafter.

are keyed to the eccentric end portions 25 of the axles o1- shafts 23. The means for operating the arms 2& as required will be Mounted in the channels of the frame members 22, as best shown castings 26 which provide ways for the guidance of the carriage 27. This carriage serves to support the grinding wheel. the cradle, the motor and related parts, all of which are bodily reciprocated in the frame. The upper portion 28 of the carriage 27 serves to support a swivel nut- 29 which cooperates with a worm or screw 30 and a hand wheel 31 for a purpose hereinafter described.

Mounted on the trunnions 32 is the cradle,,

the lower portion 33 ofwhich carries the grindin'g'wheel 3i and the upper portion 35 of which carries themotor 36. A shaft 37 has a bearing in one of the hollow trunnions 32 in the carriage 27. and at the outer end of the shaft 3? is mounted a pulley 38, a hand operated clutch 39 being provided for connecting and disconnecting the pulley from the shaft as desired. This clutch may be of any of the various well known types. A belt extends from one end of the armature shaft to the pulley-3%, such belt being indicated in dotted lines in Fig. 1 and numbered 39'.

The cradle is mounted in the carriage for limited oscillation on its trtinnionsSi. the cradle being heldin adjusted position by means of the worm 30. which connected to the upper portion T0 of' the frame. The adjustment of the grinding wheel 3% with relation to the rail is secured by manipulating the hand wheel 31. A belt ll connects the opposite end of the armature shaft to the grinding wheel 31 As a means for causing the reciprocatlon of the carriage and consequently of the grinding wheel. I provide the worm or scre v li. best shown in Figs. 3 and 5. the same being held against bodily longitudinal movement as well against rotation. except when operated by' the crank l3. normal operation this crank is held in a fixed position by means of a pin :t-f in the handle of the crank 43. which engages with an opening in the frame. member. owever. at times manual operation of the screw l2 may be desirable and provision is made therefor. The mechanism which cooperates w1th the screw 42 to cause rec1procation of the carriage include a pinion l5.

fixed to the shaft 37. as best shown in Figs. and this pinion engaging two: bevel gears 4 1 T7. having the same axis of rotation and located on opposite sides of the pinion. The result is that these gears roin Fig. 5, are

such gears are sleeves 48, 49, which are mounted in suitable bearings and accommodate tubular env elops 50 which surround the screw l2. Mounted in a recess which surrounds the envelops 50 are springsol, the outer ends of which bear against a nut 53. The exterior of this nut 53 is hexagonal, as best shown in Fig. 5, and is fitted within and slidable upon a yoke c'ol -lar 54. having teeth or projections 55, 56,

upon opposite faces thereof. These teeth or PISOJECU'OHS are intended to engage with similar teeth 57, 58, upon the gears -16. 4:7.

The collar .34 is caused to alternately Jengage .w1th the gears Jai H. by means ofthe yoke the yokebeing fixed to the tube 60, which slides on the rod 84', as best shown 1n Fig. 4. As a .means for holding the .tube 60 and likewise the yoke 59 and collar at in adjusted positions, I provide the device -shown in Fig. 10; which comprises a two-part clamp 61;. which has fixed thereto a triangular projection 62 adapted to contact a spring-pressed stud 3 having a triangulanend portion and held in properrelation by engagement with a bracket M. projecting from the casing (15' which surrounds the reversing gear heretofore described. This bracket is best shown in Fig. .3. A rod Sl'. best shown in Figs. and 4. extends from end. to end of the frame being rigidly attached thereto at its ends. On the rod 8*, which extends through and beyond eachend of the tube 60. are adjnstable stops or clamps 64 and 6-3. as shown in Fig. 3. From the clamps 64. -7. project.

arms 66. 7. which terminate instops U9 and 9. (see Fig. ll. the clamps T1. T0. limited by the rods 95. 99. passing through the projecting arms (1 68. so that the stops 6 and G-l cannot be moved except in acertain relation to'the stops T1. T0. The outer ends of the rods 7'2. T3. engage the upper ends of the levers Ql heretofore referred to. The inner ends of the rods are guided in sockets H. 75,

carried by suitable ln'ackets on the carriage.

The rods T;2. T3."slide freely within said soc ketsa'tntil the ends of the socket meni? hers tents-e1 with clamps which hold the arms it]. 'T1 whereupon the rods 72. T3.

arms 10. T1. are bodily moved in the direc tion of movement of the carriage. This continues-until the tube 60 contacts with one of the stops 6%. 6-3, when the yoke collar 5% is shifted to change the direction of movement of the carriage 27. Before the carriage has been reversed. however. one of the arms-2i has been shifted. with the result that the corresponding end of the frame has been bodily raised. due to the eccentricity of the axle As the carriage 1s re\ 'ersed.- the arm 2-1 is caused to return bv the sp g 74', the extent' of The movement wheel may be as long or as short as desired.

It will be noted that by the arrangement illustrated in Fig. 1 the wheel travels in a plane, except at the .end of the stroke when it is lifted and again returned in the same path. This occurs at both ends of the stroke or movement. The extent of lifting movement of the grinding wheel may likewise be controlled by positioning the stops 70, 71, with relation to the stops 6%, 65; that is to say,'the carriage may be reversed with practically no lifting movement of the carriage at the end of the stroke.

As ameans for securing the lateral adjustment of the frame and associated parts, I provide the mechanism best shown in Figs. '1, 7 and 8. As shown in these figures, a bracket 77 is fixed to the end 21 of the car, this bracket carrying a threaded shaft 78. A -casting 79 has a recess which accommodates the bracket 77, the parts being held in proper relation by theoverhanging bars 80. A nut 81 engages the threaded shaft or worm 78 and is carried by the casting 79. By reason of such construction a rotation of .the threaded shaft or worm 7 8 will cause a bodily lateral movement of the casting 79 and the parts connected thereto. Mounted in sockets 82, 83, carried by the casting 79 is a spindle -or hollow standard 84, within which is located a threaded shaft 85, the lower end of which is pinned at 86 "to a casting 87, as best shown in Fig. 7. A hand wheel 8 8.enga es the threaded shaft at the upper end, he hub of the wheel finding a bearing on a thimble 89, which bears upon the top of the hollow standard 81. Bodily vertical adjustment 0 the frame is secured by rotation of the hand wheel, the frame 2:2 pf the "machine being connected slidably to said standard by means of the brackets or straps 90, 91, as

- bestvshown in Fig. 7

best shown As a means for securing oscillation of the grinder frame in order to grind at different angles other than actual horizontal position, I provide the mechanism best shown in Figs. 6 and 7. The frame members 22, as best shown in shaft 912, on which a casting or a vertical frame member 93 is mounted. The lower end of thiscasting or frame member 93 is provided with a engages a hook 95, held by a bolt 96 to the casting 87.

The projection 94: is arcuate, as

shifting of the frame member 9 3 with relacarry a transverse lateral projection 94, which in Fig. 6, which permits of the tion to the casti 1g 87 and consequently the shifting of the entire frame 22 and associated parts witlh relation to the car21. The shifting action s secured by means of the worm 9T, carritd by brackets mounted on the strap'91, as best shown in Fig. 7, the worm 97 engaging an arcuate rack 98 fixed to the upper em. of the vertical frame member 93. In this frame member I provide an arcuate slot 99 a nd a bolt 100 passes through this slot which serves to hold the parts in adjusted positicn after having been located by the aid of the worm 97. It will be seen.

that while the car 21 serves to support one 91, will slide f1 eely on the hollow standard the standard 84, and the rod 85 will rise in carrying the h: nd'wheel S8 therewith.

It is thou h the operation of the device has been fully explained in connection with the description of the mechanism. It might be stated, howe ver, that after having located the apparatus in proper position the grinding wheel 34: i; lowered relative to the carriage and tracl: rail to be operated upon, by rotating. the s ame about the trunnions 32 as a' pivot through themedium of the hand wheel 31 and worm 30. Theelectric motor is then started. which causes the rotation of the grinding wheel and starts reciprocation of the carriage which carries the grinding wheel and motor. The length of strokeof the carriage is determined by the adj ustment of thest ops 64,65. It may be desired to discontinue thev automatic reciprocation of the carriag a and parts, in which case the clutch39 is disengaged from the shaft 37, this allowing the pulley to run idly. In such case the :arriage maybe shifted manu ally by means of the hand lever 43 whn found desirable or necessary.

One of the advantages in the present construction is tl' at-the carriage is reciprocated by the use of a clutch which is positive and still without: hook to any of the parts.

This result is secured by reason of the nut 53 and the sp rings 51, 52, which bear against the end of the nut. (See Fig. 4). The carriage 1s reciprocated through the springs.

the construction is capable of such modifications mounted on said frame, a grinding wheel and motor mounted on said carriage, means for causing the reciprocation of said carriage andmeans adapted. to be actuated near the end of the stroke of said carriage for causing a bodily lifting of said frame.

3. In a grinding machine, the combination of a frame, means for supporting the same above a rail, a carriage reciprocably mounted on said frame, a grinding wheel and motor mounted on said carriage, means for causing the reciprocation of said carriage and means adapted to be actuated at the limit of the reciprocations of said carriage for causing an alternate raising and lowering'of the ends of said frame and associated parts. substantially as described.

at. In 'a'grinding'machine, the combination of a frame, means for supporting the same above a rail, a carriage reciprocablv mounted on said frame, a grinder frame mounted for oscillation on said carriage, a grinding wheel and a motor mounted on said grinder frame, automatic means for causing the reciprocation of said carriage and manually operableme'ans for causing oscillation of said grinder-frame, substantially as described. 7

5. In-a device of the class described, the combination of a frame, means for supporting the same above a track rail, an eccentric shaft disposedbetween said track 'rail and said frame, a lever for causing rotation of said eccentric shaft and consequently a change in the distance between said frame and said rail, a carriage reciprocably mount- .ed upon said frame and means actuatable by said carriage near the end of the stroke thereoffor actuating said lever to cause the elevation of said frame, substantially as described.

6. In a device of the class described the combination of a frame, means for supporting the same above a track rail. means for causing limited variation in the distance between said frame and said track rail, a*

lever for actuating said adjusting means. a carriage reciprocablv mounted upon said frame. a grinding wheel mounted upon said carriage. means for causing automatic reciprocalon of said carriage and means mov able bv said carriage mama-(ma said 1e ver. thereby causing a bodily elevation of said frame and consequently said grintl'im; wheel at the end of the stroke f said"? a1.- riage. substantially as le t-libel].

T. In a device of the litv I'l'l 1 .l. the combination of a frame. a u-nni-iigtreciprocablvmounted upon said frame. a grinding wheel carried by said carriage. automatic means for causing the. reciprocation of said carriage, said 1nean-"S inc1ud'1ng a fixed screw and a rotatable nut carried bv said carriage, and a spring interposed between said nut and said carriage whereby the force 7 exerted to cause the movement of said carriage is exerted through said spring, substantially as described. J

8: In a device of the class described, the

combination of 'a'frame, a carriage reciprocably mounted upon said frame, a. grinding wheel mounted upon said carriage, a motor also mounted upon said carriage, means for causing the reciprocation of said carriage, said means including a fixed worm and a rotatable nut movable with said carriage and a spring disposed at each endof said nutand so arranged that the force tending to cause a movement of said carriage is exerted through one of said springs, substantially as described.

9. In a device of the class described, the

combination of a frame, a grinding wheel,

a motor reciprocably mounted with relation to said frame, and means for causing the reciprocation of said grinding wheel, said means including a bevel pinion. two bevel gears engaging opposite sides of said pinion, said bevel gears having toothed faces;

while the 'shock of reversal is cushioned by said springs. substantiallv described.

10. In a device of the class described, the combination of a frame, means for supporting the same above a track rail. an 'end support by means of which said device is maintained in proper vertical position. a motor and grinding wheel carried by said frame. and means for movlng said. frame. laterally with respect to said end support, substantially as described.

11. In a device of the class described. the combination of a frame, means for supporting the same above a track rail, anend support by means of which said device is maintained-in proper vertical position, a motor and grinding wheel carried by said frame 12. In a device of the class described, the 5 combination of a frame, means for supporting the same above a track rail, an end sup 'port by means of which saiddevice is malntamed in proper vertical position, a motor and grinding wheel carried by said frame and means for rocking said't'rame about a.

center in the plane of the top surface of said 'vtrack rail, su stantmlly as described.

13. In a device of the class described, the

combination of a frame, means for supportggthe, same above a track rail, an end suppo'rtby means of which vsaid device is maintained in proper vertical position. a motor ;jand grindlng wheel carried by said frame and means associated with said end support '20 and said frame for adjusting the same later- .ally, lifting the same vertically or rocking {the same about a center in the plane of the 5 top surface of said track rail, substantially as described.

tion of a frame, a carriage reciprocably mount-'ed '"on said frame, a grinding wheel 14. In a grinding machine, the combina mountedon said carriage, automatic means for causing the reciprocation of said carriage, adjustable means for controlling the extent of reciprc cation of said carriage, automatic means for lifting said grinding wheel at the end of the stroke of said car riage, and manuz lly operable means for raising said grinding Wheel a substantial distance above said track, substantially as described.

15, In a grim ing machine the combination of a frame, a carriage reciprocably mounted on said frame, a grinding wheel mounted on said carriage, means for causing the reciprocatior of said carriage, means for controlling the extent of reciprocation of said carriage, 1n aans for lifting said grind ing wheel at tho end of the stroke of said carriage, and 1111 ans for raising said grinding wheel a subutantiahdistance above said track, substantially as described.

Signed at- J oh: istowii, Pa., this 27th day of October, 1916.

' HENRY 1?. A. KLEINSOHMIDT.

'itnesses H. \V. S3. 1TH, \V. MIL'r. BROWN. 

